I am trying to make a 40% lactic acid peel with 90% pure lactic acid. What are the steps needed to dilute the lactic acid to a 40%. I was thinking 1sp of distilled water and 1sp of lactic acid? Please correct me if I am wrong.
Also I am trying to make a 12% lactic acid lotion with 12oz of lotion. Again what are the steps needed to dilute my 90%lactic acid to a 12% to add to my 12oz lotion.